Regulating the frontier orbital of iron phthalocyanine with nitrogen doped carbon nanosheets for improving oxygen reduction activity

Abstract

Iron phthalocyanine (FePc) has attracted widespread attention for its tunable electronic structure. However, the Fe-N sites suffer from undesirable oxygen reduction activity due to the symmetric geometries. A suitable substrate...

Synergistic coupling of defective SOx-containing carbon and iron phthalocyanine for efficient oxygen reduction

“…However, the robust delocalized electronic properties of the π-band on the carbon materials can elevate the d orbital energy level of the Fe center, resulting in strong adsorption of intermediates on the Fe center, which can poison the active sites in FePc. 27–29 Since the single Fe center is sensitive toward the surrounding electronic environment, 30 an effective strategy to enhance the catalytic ability of the FePc/carbon composite involves creating an adjustable environment around the Fe single atoms by introducing electron-withdrawing functional groups. 31,32 Functional groups with high electronegativity, such as F, OH, Cl and O, have been proved to effectively promote the formation of electron-deficient Fe single-atom sites.…”